NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 586
NEW CINGULAR WIRELESS PCS, LLC - IL 1
INTRADO COMMUNICATIONS, LLC 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2024-02-21 586-346-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 UTICA MI
2024-02-20 586-358-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 UTICA MI
2024-02-20 586-358-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 UTICA MI
2024-02-16 586-926-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WASHINGTON MI
2024-02-16 586-926-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WASHINGTON MI
2024-02-16 586-926-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WASHINGTON MI
2024-02-15 586-366-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ARMADA MI
2024-02-15 586-366-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ARMADA MI
2024-02-15 586-366-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ARMADA MI
2024-02-14 586-341-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROMEO MI
2024-01-23 586-738-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2024-01-12 586-928-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J NEW HAVEN MI
2023-12-18 586-684-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D NEWBALTIMR MI
2023-12-13 586-491-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROSEVILLE MI
2023-10-27 586-352-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2023-10-27 586-352-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2023-10-27 586-352-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2023-10-12 586-362-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J ROSEVILLE MI
2023-09-29 586-366-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ARMADA MI
2023-09-19 586-341-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2023-09-19 586-341-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2023-09-19 586-341-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2023-09-11 586-352-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2023-09-08 586-352-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2023-09-08 586-352-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2023-09-01 586-742-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROSEVILLE MI
2023-08-25 586-341-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROMEO MI
2023-08-04 586-330-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2023-08-04 586-926-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2023-07-27 586-302-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2023-07-25 586-340-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C CENTERLINE MI
2023-07-25 586-341-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ROMEO MI
2023-07-25 586-742-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2023-07-25 586-742-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2023-07-20 586-341-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2023-07-20 586-368-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WARREN MI
2023-07-07 586-648-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J NEWBALTIMR MI
2023-06-30 586-302-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2023-06-30 586-326-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2023-06-30 586-352-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2023-06-30 586-368-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WARREN MI
2023-06-30 586-368-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C WARREN MI
2023-06-22 586-368-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C WARREN MI
2023-06-22 586-368-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C WARREN MI
2023-06-22 586-648-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2023-06-22 586-742-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2023-06-22 586-742-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2023-06-08 586-302-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2023-06-02 586-301-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WARREN MI
2023-06-02 586-304-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.